no. i got the maxi blumats. so i just shove them in from above and just have them drip towards the stalk. i place the blumat just past the halfway point of the radius from the stalk to the edge of the pot, so it measures moisture closer to the outside of the pot rather than the center because the outer edges of the fabrics get dry a little quicker. water will naturally wick outward to keep that area moist enough

Exactly! The soil is naturally full of heavy metals and other natural toxins. Plants have developed this process for keeping the fruit (seeds) free of toxins. That is why you see nute burn in the leaves. Some plants like pine trees drop waste that changes the soil chemistry to prevent other plants from growing.

After Mount St Helens blew up, the plants that popped up in the fried wasteland were studied heavily to see how the new niche would be exploited. It is good subject matter for a thesis

Exactly! The soil is naturally full of heavy metals and other natural toxins. Plants have developed this process for keeping the fruit (seeds) free of toxins. That is why you see nute burn in the leaves. Some plants like pine trees drop waste that changes the soil chemistry to prevent other plants from growing.

After Mount St Helens blew up, the plants that popped up in the fried wasteland were studied heavily to see how the new niche would be exploited. It is good subject matter for a thesis

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If i were using outdoor soil id be leary on the composted leafs, but for those of us that build our own soil from scratch for indoor and choose glacial rock or basal over the traditional azomite i wouldnt think the levels of toxins/metals would be extremley minimal, allowing for years of composting plant waste.
In addittion i dont use any guanos of any type anymore and only a few manures being rabbit and alpaca, nothing else. But as of the last year ive only been straight veganic with soil amendments and occasionally giving a boost of FPE i make myself.
However, you are correct about the allocation of toxins to the leaves.

Hmmm...that might be my problem with my soil running out of N way too early. Almost all of my amendments are DTE.

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use slow release forms of nitrogen, the best being lots of steer manure, hoof horn meal, feather meal (has arsenic), doghair, etc.
gotta mix slow, medium and fast release forms of nitrogen.
it's used the most of any macro by far